Bruce Clarke is Professor of English and Director of the Center for the Interaction of the Arts and Sciences at Texas Tech University. He is the author, most recently, of" Energy Forms: Allegory and Science in the Era of Classical Thermodynamics. "Linda Dalrymple Henderson is David Bruton, Jr. Centennial Professor in Art History at the University of Texas at Austin. She is the author, most recently, of" Duchamp in Context: Science and Technology in the Large Glass and Related Early Works."